Fuel/airmixtureincorrect:●Aircleanerelementclogged,poorlysealed,ornotinstalled●Throttlebodyassyholderloose●Aircleanerductloose●FuelpumpdefectiveCompressionlow:●Sparkplugloose●Cylinderheadinsufficientlytightened●Cylinderboltloose●Cylinderorpistonworn●Novalveclearance●Valvespringbrokenorweak●Valvenotseatingproperly(valvebent,worn,orcarbonaccumulationontheseatingsurface)●Pistonringworn,weak,broken,orsticking●Pistonringsideclearanceexcessive●Cylinderheadgasketdamaged●Cylinderheadwarped●Cylinderbasegasketdamaged●DecompressiontroublePoorlow-speedperformance-Sparkweak:●Sparkplugdirty,broken,orgapimproperly●Sparkplugcaporhigh-tensionwiringdefective●Sparkplugcapshortedornotcontactingproperly●Sparkplugtypeincorrect●Crankshaftsensordefective●ECUdefective●Ignitioncoildefective●Alternatordefective●WiringconnectornotingoodcontactFuel/airmixtureincorrect:●Aircleanerelementclogged,poorlysealed,ornotinstalled●Fueltankcapairventobstructed●Throttlebodyassyholderloose●Aircleanerductloose●FuelpumpdefectiveTROUBLESHOOTINGGUIDE185
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